Duplex stop-motion.



W. O. ALDRICH.

DUPLEX STOP MOTION.

APPLICATION FILED JUNE 22, 1911.

Patented Dec. 17,1912.

2 SHEETSSHEET l.

W. O. ALDRICH.

DUPLEX STOP MOTION.

APPLICATION FILED JUNE 22, 1911.

Patented Dec. 17, 1912.

2 SHEETSSHEET 2.

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unrrn STATES PATENT EPCE.

WILLIAM O. ALDRICH, OF WI-IITINSVILLE, MASSACHUSETTS, ASSIGNOR TO THE WHITIN MACHINE WORKS, OF WHITINSVILLE, MASSACHUSETTS, A CORPORATION OF MAS- SACI-IUSETTS.

DUPLEX STOP-MOTION.

Specification of Letters Patent.

Patented Dec. 17, 1912.

To all whom it may concern:

Be it known that I, W ILLIAH ALnRIoH, a citizen of the United States, residing at \Vhitinsville, in the county of Worcester and Commonwealth of Massachusetts, have invented certain new and useful Improvements in Duplex Stop-Motions, of which the following is a full and concise description, as required by statute.

My invention is an improvement in stop motion devices for machines which operate upon cotton sliver or analogous material, and consists in an improved arrangement of means for stopping the machine upon the occurrence of extreme conditions of sliver tension, that is to say, upon excessive tension due to abnormal thickness of sliver or upon insufiicient thickness generally due to failure of the sliver. These functions are performed by the movement of the sliverguide or trumpet-lever, into either of two extreme and opposite positions, such movement causing an abutment to move into the ath of a power controlling mechanism whereby the machine is stopped in order that the abnormal conditions may be corrected. According to my present invention, this function is performed with greater certainty and effectiveness than heretofore, by means of the device hereinafter described whereby motion of the sliver-guide is multiplied in a positive and quick-acting manner to place the abutment in its stopping position, and the object of the invention is, more especially, to incorporate mechanism for such purpose with the usual roll-cover and trumpet-lever in a simple and compact manner, so that the mechanism will be susceptible of ready application or adaptation to existing types of machines.

The object of the invention is further to provide a stop-motion device of the aforesaid character which will be capable of ready inspection and adjustment when necessary, the sensitive parts thereof being also so located as to be protected from falling dirt.

More particularly, I provide the abutment device supported by and within the usual hinged roll-cover, in order to protect it from obstruction by accumulations of fluff and dirt.

Further objects of my invention, involved in the construction of parts and combinations of elements hereinafter described, will be apparent to those skilled in this art Without explanation.

The accompanying drawings, forming part hereof show a preferred embodiment of my invention as adapted to the coilerhead of an ordinary cotton drawing-frame, Figure 1 being a top plan view of a single coiler-head, with parts broken away; Fig. 2 a central vertical section through the coiler-head and trumpet, Fig. 3 an enlarged central section through the sliver-guide, and parts ooacting therewith, the sliver-guide being shown in one of its extreme positions, namely that to which it is moved by excessive tension of the sliver; Fig. 4 a similar view with the sliver-guide in its other stopping position to which it is moved by decreased tension or failure of the sliver; Fig. 5 being a perspective view of the adjustable weight adapted to be mounted upon the sliver-guide to counterbalance the same, and Fig. 6 representing a top view of the sliverguide with the trumpet removed.

The usual parts of the drawing-framecoiler-head appearing in Figs. 1 and 2, comprise the horizontal coiler-gear plate 1, which is rigidly supported in projecting relation from the roller beam 2 and carries the revoluble coiler-gear 3, rim-journaled on the margin of a large circular aperture, in the coiler-gear plate. The coiler-gear is formed with an oblique channel or sliver tube 4, extending from an upper central point thereof to a lower point near the periphery so that the sliver passing down the tube, as the gearis revolved, is thereby laid in coils in the sliver-can placed beneath. In Fig. 2 the removable protecting cover 5, of the gear is shown in place. The sliver passes from the delivery drawing-rolls 6, through the pair of conducting or calenderrolls 7, to the mouth of the diagonal sliver tube. The latter rolls, 7 are protected by a roll-cover 8 which is hinged by its rear edge, by pins 9, to the rearwardly extending arms 10 of the roll-cover bracket 11, which bracket is a fixed part bolted to the roller beam and overhanging the coiler-gear. The hinge 9 of the roll-cover is disposed on the underside thereof and is adapted to support the same in a position immediately over the calender-rolls, as shown in Fig. 2, and the forward ends of the roll-cover bracket 11 provide abutments 10 for supporting the rollcover as well as the sliver guide carried thereby, at a proper distance above the rolls 7.\ The upright post of supporting bracket 11 is slotted, as shown at 12, to receive or ment of bar 13 which is so connected that when obstructed or held against forward movement it will turn off the power of the machine. In the familiar device shown for this purpose in the drawings the reciprocating motion of sliding-bar 13 is imparted to it by wag-shaft 14 through crank-arm 15, the organization being such that stopping of the forward motion of the sliding-bar causes the shifting of a belt-shipping-lever whereby the machine is stopped. These parts are well known and consequently are not illustrated, it being understood that the mechanism described is merely illustrative and that the bar 13 or a similar member may be arranged to stop the machine by its coaction with the sliver-guide as described below.

The roll-cover 8 is provided with a slot or recess intermediate of its front and rear margins, within which is mounted the sliverguide, which, in the illustrated embodiment of the invention, comprises a condensing trumpet 16 and a lever 17, by which the trumpet is held. The trumpet 16 is preferably detachable from its lever so that others of different sizes can be substituted in its place to accommodate slivers of different which portion of the lever occupies or extends above the recess formed in the rollcover referred to. The lever is pivoted upon a pin 18, mounted in ears depending from the under side of the roll-cover so that the trumpet is held in position within or in registry with the recess in the roll-cover and thereby is capable of movement toward or from the rolls. A stop ledge 20 limits the downward movement of the lever through its recess. The trumpet-holder lever is counterbalanced against the tension of the sliver passing through the trumpet, by means of a slotted weight 19, mounted upon its tail end and which is preferably adjustable, toward and from the pivot in order to vary the counterbalance in accordance with the sliver tension. The normal adjustment is such that the trumpet-holder occupies the intermediate position shown in dot and dash lines of Figs. 3 and 4, under the steady pull of the supply of sliver passing through the trumpet in ordinary working conditions. If the tension of the sliver becomes excessive as when a bunch passes into the trumpet, the trumpet-holder moves into the extreme position shown in full lines in Fig. 3, in which it is stopped by the seat or ledge 20, the weighted end of the lever 17 being correspondingly raised. If the sliver tension diminishes, the trumpet and holder move upwardly, under the effect of the counterbalance, into the fullline position shown in Fig. 4, the weighted end of the trumpet holder or lever being thereby lowered.

The sliding-bar 13 or similar member, the motion of which is to be stopped, is provided with a projecting face, such as the shoulder 21, and is adapted to be obstructed by such face when the trumpet-holder assumes either of these two extreme positions. For this purpose the tail end of the trumpetholder is provided or associated with a lever which I shall herein designate as the stopping lever, and the arrangement of this stopping lever is such that it can swing into and out of the path of the abutment face with a greater range of movement than is possible for the tail end of the trumpetholder itself. Various means of mounting the lever can be employed for accomplishing this purpose, but I prefer to mount the stopping lever marked 22 on a pivot 24, which is carried by the trumpet-holder 17, in the rear of its own pivot, and allow it to be operated, whereby such extended range of movement is provided, by contact or engagement with some relatively fixed part, for instance the roll-cover 8. The pivot 24 is formed by a cross-pin held by a pair of lugs 25 on the back of the trumpet-holder, and the rear end of the said holder is slotted or bifurcated to accommodate the stopping lever and also provided with a cross-pin 28, across the slot to limit the movement of the stopping lever, relatively therethrough. A spiral spring 26 mounted between trumpet-lever and the underside of stopping-lever 22 operates to press the latter, upwardly and against the cross-pin 28, in which position it remains under Working conditions of sliver tension. Spring 26 is preferably housed in a suitable recess in the portion of the trumpet-lever to the rear of the pivot thereof, a bottom screw 27 being provided in the lower end of the recess, to vary the tension of the spring. When the trumpet-holder occupies its intermediate position with the stop-lever light, the stopping-lever is lowered so that its foot portion is placed in line bet-ween the rear face of rollsupporting-bracket 11 and the shoulder 21 of the sliding-bar in which position it forms an obstruction to the forward movement of the sliding-bar and stops the machine.

In the present exemplification of the invention, the stopping-lever 22, is provided with a cont-act surface in the form of a proj ection 29, upon its upper surface close to its own pivot pin. This projection is adapted to encounter the underside of the roll-cover when the tail end of the trumpet-lever is raised by excessive tension of the sliver. It will be seen that such movement lifts the pivot pin 24 as well as the stop or cross-pin 28,so that the lever 22, is bodily lifted until its projection 29 engages the underside of the roll-cover, and as the upward movement continues after such contact, the effect is to swing the stopping-lever downwardly, changing its angular relation to the trumpetlever, so that its foot portion 23 moves away from contact with the stop-pin 28 into position to engage the shoulder of the slidingbar. The foot of the stopping-lever is thus inserted between the shoulder of the slidingbar and the bracket 11, in exactly the same position as was described above in the case of insuflicient sliver tension and with the same result. The motion of the stoppinglever is one of oscillation relatively to the tail of the trumpet-lever and against the compression of spring 26. From the moment when the projection 29 engages the underside of the roll-cover, the contacting rounded surface of the lug upon the rollcover becomes the fulcrum of the lever; the force to oscillate the same being applied at the pivot pin 2st by the upward movement of the tail of the trumpet-lever, and the said fulcrum and pivot pin are relatively close together so that the power arm of the stoplever is very much shorter than its other working arm which extends from the fulcrum 29 to the foot of the lever marked 23 and the obvious result of this arrangement is such that a slight upward movement of the pin 24, after engagement with the rollcover, results in a greatly multiplied movement of the foot of the stopping-lever in the opposite direction. A sufficient range of movement is of course provided for the trumpet-lever and stopping-lever, before contact of the latter with the roll-cover, to insure that the machine will not be stopped by normal variations in the sliver tension, while the multiplication of motion and quick action of the stopping-lever insure the certain and immediate stoppage of the machine wherever the margin is exceeded. The normal distance between the lug 29 and the roll-cover can be adjusted by the location of pin 28, or the pivot 24, which, together with any desired adjustment of spring 26, will make the device respond to any desired variation of the sliver tension from normal.

I claim:

1. In a sliver stop-motion for drawing frames and like machines, the combination with the sliding bar of the stop motion and the pivoted trumpet lever, of a second lever pivoted on said trumpet lever and having a foot portion adapted for intercepting said sliding bar and a fulcrum adjacent its pivot to contact with a stationary part.

2. In a sliver stop-motion for drawing frames and like machines, the combination wit-h the sliding bar of the stop-motion, the roll-cover and the trumpet lever pivoted thereto, of a second lever between said trumpet lever and cover having its point of pivotal support upon one of these two parts and its fulcrum bearing on the other, and having a part on its longer arm adapted to intercept the sliding bar.

3. In a sliver stop-motion, the combination with a power-controlling member, of a sliver-guide comprising a lever, subject to the sliver tension and having extreme positions corresponding respectively to excessive and insuflicient tension, and lever means pivoted on and carried by said lever, adapted to engage said controlling member when said lever is in an extreme position.

4. In a sliver stop-motion, the combination with a sliver-guide comprising a lever having extreme and intermediate positions, corresponding to conditions of sliver tension, of a member pivoted to said lever and movable therewith, and an abutment adapted to coact with said pivoted member when said lever moves into one of said extreme positions to move said member pivotally with respect to said lever.

5. In a sliver stopmotion, the combination with a sliver-guide comprising a member movable into different positions by the tension of the sliver passing through said guide, of a lever fulcrumed on a movable pivot positioned to be moved by said member when moving in one direction, and an abutment positioned to be encountered by said lever when movement in said direction is continued to oscillate said lever.

6. In a sliver stop-motion, the combination with a sliver-guide comprising a member movable into difierent positions by the tension of the sliver passing through said guide, of a lever mounted in position to be moved bodily by movement of said member, means for maintaining the angular relation of said lever to said member, and means adapted to coact with said lever when said member is moved into an extreme position to change the said angular relation.

7. In a sliver stop-motion, the combination with a moving power-controlling member, of a sliver-guide comprising a member movable into diiferent positions by the ten- I sion of the sliver passing through said guide,

a lever resiliently carried by said movable member and having a projection adapted for stopping said moving power controlling member when said movable member is in one extreme position, and means encountered by said lever when said movable member moves to its other extreme position for oscillating the lever into position to cause said projection to stop said controlling member.

8. In a sliver stop-motion, the combination with a movable trumpet-lever of a moving power-controlling member, a stop therefor, and adjustably spring-pressed means for multiplying movement of said trumpetlever to move said stop into the path of said controlling member.

9. In a sliver stop-motion, the combination with a sliver-guide, comprising a lever, of a roll-cover, a lever pivotally connected to said first lever and a spring support for said second lever on said first lever, said parts being so positioned that movement of said first lever in one direction causes engagement between said roll-cover and said second lever to rock the latter.

10. In a sliver stop-motion, the combination with a counterbalanced trumpet lever, of a roll-cover, a lever pivotally mounted on said trumpet-lever to the rear of the pivot thereof and below said roll-cover, and having an upwardly projecting portion beyond its pivotal connection with said trumpet lever, adapted to be brought into engagement with the underside of the roll-cover on upward movement thereof, and spring means supporting said lever from said trumpetlever.

11. In a sliver stop-motion, the combination with a counterbalanced lever having diiferent positions corresponding to conditions of sliver tension, of a lever mounted to move with said trumpet lever and having a foot adapted to act as a stop-motion device when in one position, connections between said levers for locating said foot in said position when said trumpet lever is in one extreme position, and means for oscillating said second lever when said trumpet lever moves into its other extreme position to locate said foot in the same stop-motion posi-' tion.

In testimony whereof, I have signed this specification in the presence of two wit-- nesses.

WILLIAM O. ALDRICH.

Witnesses:

OsoAR L. OWEN, CHARLES A. ALLEN.

Copies of this patent may be obtained for five cents each, by addressing the Gommissioner of Patents,

Washington, D. 0. 

